Though the 9-year-old is still years away from her wedding, there’s already speculation she could one day wear her late grandmother Princess Diana’s iconic tiara. Will she be allowed to?

Princess Aiko, the only child of Emperor Naruhito and Empress Masako, finally got to wear a tiara--a borrowed one though--when she attended a ceremony Dec. 5 to her entry into adulthood.

You can collect and wear it to get gameplay advantages ... so keep reading as we share the exact locations of the Mermaid Tiara, Tail, and Armour in Hello Kitty Island Adventure.